test/CodeGen/X86/catchpad-reuse.ll

   1 ; RUN: llc < %s | FileCheck %s
   2
   3 ; IR generated by the following C++ source with modifications to reuse the 'v'
   4 ; alloca between catchpads:
   5 ; extern "C" void maythrow();
   6 ; int main() {
   7 ;   try {
   8 ;     try {
   9 ;       maythrow();
  10 ;     } catch (int v) {
  11 ;       maythrow();
  12 ;     }
  13 ;   } catch (int v) {
  14 ;     maythrow();
  15 ;   }
  16 ;   return 0;
  17 ; }
  18
  19 ; CHECK: $cppxdata$main:
  20 ; CHECK-NEXT: .long   429065506               # MagicNumber
  21 ; CHECK-NEXT: .long   4                       # MaxState
  22 ; CHECK-NEXT: .long   ($stateUnwindMap$main)@IMGREL # UnwindMap
  23 ; CHECK-NEXT: .long   2                       # NumTryBlocks
  24 ; CHECK-NEXT: .long   ($tryMap$main)@IMGREL   # TryBlockMap
  25 ; CHECK-NEXT: .long   5                       # IPMapEntries
  26 ; CHECK-NEXT: .long   ($ip2state$main)@IMGREL # IPToStateXData
  27 ; CHECK-NEXT: .long   32                      # UnwindHelp
  28 ; CHECK-NEXT: .long   0                       # ESTypeList
  29 ; CHECK-NEXT: .long   1                       # EHFlags
  30
  31 ; CHECK: $tryMap$main:
  32 ; CHECK-NEXT: .long   1                       # TryLow
  33 ; CHECK-NEXT: .long   1                       # TryHigh
  34 ; CHECK-NEXT: .long   2                       # CatchHigh
  35 ; CHECK-NEXT: .long   1                       # NumCatches
  36 ; CHECK-NEXT: .long   ($handlerMap$0$main)@IMGREL # HandlerArray
  37 ; CHECK-NEXT: .long   0                       # TryLow
  38 ; CHECK-NEXT: .long   2                       # TryHigh
  39 ; CHECK-NEXT: .long   3                       # CatchHigh
  40 ; CHECK-NEXT: .long   1                       # NumCatches
  41 ; CHECK-NEXT: .long   ($handlerMap$1$main)@IMGREL # HandlerArray
  42
  43 ; CHECK: $handlerMap$0$main:
  44 ; CHECK-NEXT: .long   0                       # Adjectives
  45 ; CHECK-NEXT: .long   "??_R0H@8"@IMGREL       # Type
  46 ; CHECK-NEXT: .long   [[v_offset:[0-9]+]]     # CatchObjOffset
  47 ; CHECK-NEXT: .long   "?catch$2@?0?main@4HA"@IMGREL # Handler
  48 ; CHECK-NEXT: .long   {{.*}}                  # ParentFrameOffset
  49
  50 ; CHECK: $handlerMap$1$main:
  51 ; CHECK-NEXT: .long   0                       # Adjectives
  52 ; CHECK-NEXT: .long   "??_R0H@8"@IMGREL       # Type
  53 ; CHECK-NEXT: .long   [[v_offset]]            # CatchObjOffset
  54 ; CHECK-NEXT: .long   "?catch$4@?0?main@4HA"@IMGREL # Handler
  55 ; CHECK-NEXT: .long   {{.*}}                      # ParentFrameOffset
  56
  57 ; ModuleID = 't.cpp'
  58 source_filename = "t.cpp"
  59 target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
  60 target triple = "x86_64-pc-windows-msvc19.0.24210"
  61
  62 %rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
  63
  64 $"\01??_R0H@8" = comdat any
  65
  66 @"\01??_7type_info@@6B@" = external constant i8*
  67 @"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
  68
  69 ; Function Attrs: norecurse uwtable
  70 define i32 @main() local_unnamed_addr personality i32 (...)* @__CxxFrameHandler3 {
  71 entry:
  72   %v = alloca i32, align 4
  73   invoke void @maythrow()
  74           to label %try.cont6 unwind label %catch.dispatch
  75
  76 catch.dispatch:                                   ; preds = %entry
  77   %0 = catchswitch within none [label %catch] unwind label %catch.dispatch2
  78
  79 catch:                                            ; preds = %catch.dispatch
  80   %1 = catchpad within %0 [%rtti.TypeDescriptor2* @"\01??_R0H@8", i32 0, i32* %v]
  81   invoke void @maythrow() [ "funclet"(token %1) ]
  82           to label %invoke.cont1 unwind label %catch.dispatch2
  83
  84 catch.dispatch2:                                  ; preds = %catch, %catch.dispatch
  85   %2 = catchswitch within none [label %catch3] unwind to caller
  86
  87 catch3:                                           ; preds = %catch.dispatch2
  88   %3 = catchpad within %2 [%rtti.TypeDescriptor2* @"\01??_R0H@8", i32 0, i32* %v]
  89   call void @maythrow() [ "funclet"(token %3) ]
  90   catchret from %3 to label %try.cont6
  91
  92 try.cont6:                                        ; preds = %entry, %invoke.cont1, %catch3
  93   ret i32 0
  94
  95 invoke.cont1:                                     ; preds = %catch
  96   catchret from %1 to label %try.cont6
  97 }
  98
  99 declare void @maythrow() local_unnamed_addr #1
 100
 101 declare i32 @__CxxFrameHandler3(...)
 102
 103 !llvm.module.flags = !{!0}
 104 !llvm.ident = !{!1}
 105
 106 !0 = !{i32 1, !"PIC Level", i32 2}
 107 !1 = !{!"clang version 4.0.0 "}